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Implement new helper methods for creating two-index GEP instructions

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14821 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-07-14 18:14:33 +00:00
parent b757f160fc
commit 33af23d902
1 changed files with 42 additions and 2 deletions
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44
lib/VMCore/iMemory.cpp
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@ -16,8 +16,7 @@
#include "llvm/DerivedTypes.h"
using namespace llvm;
void AllocationInst::init(const Type *Ty, Value *ArraySize, unsigned iTy)
{
void AllocationInst::init(const Type *Ty, Value *ArraySize, unsigned iTy) {
// ArraySize defaults to 1.
if (!ArraySize) ArraySize = ConstantUInt::get(Type::UIntTy, 1);
@ -177,6 +176,13 @@ void GetElementPtrInst::init(Value *Ptr, const std::vector<Value*> &Idx)
Operands.push_back(Use(Idx[i], this));
}
void GetElementPtrInst::init(Value *Ptr, Value *Idx0, Value *Idx1) {
Operands.reserve(3);
Operands.push_back(Use(Ptr, this));
Operands.push_back(Use(Idx0, this));
Operands.push_back(Use(Idx1, this));
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
const std::string &Name, Instruction *InBe)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
@ -193,6 +199,22 @@ GetElementPtrInst::GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
init(Ptr, Idx);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
const std::string &Name, Instruction *InBe)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
Idx0, Idx1, true))),
GetElementPtr, Name, InBe) {
init(Ptr, Idx0, Idx1);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
const std::string &Name, BasicBlock *IAE)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
Idx0, Idx1, true))),
GetElementPtr, Name, IAE) {
init(Ptr, Idx0, Idx1);
}
// getIndexedType - Returns the type of the element that would be loaded with
// a load instruction with the specified parameters.
//
@ -235,3 +257,21 @@ const Type* GetElementPtrInst::getIndexedType(const Type *Ptr,
}
return CurIdx == Idx.size() ? Ptr : 0;
}
const Type* GetElementPtrInst::getIndexedType(const Type *Ptr,
Value *Idx0, Value *Idx1,
bool AllowCompositeLeaf) {
const PointerType *PTy = dyn_cast<PointerType>(Ptr);
if (!PTy) return 0; // Type isn't a pointer type!
// Check the pointer index.
if (!PTy->indexValid(Idx0)) return 0;
const CompositeType *CT = dyn_cast<CompositeType>(PTy->getElementType());
if (!CT || !CT->indexValid(Idx1)) return 0;
const Type *ElTy = CT->getTypeAtIndex(Idx1);
if (AllowCompositeLeaf || ElTy->isFirstClassType())
return ElTy;
return 0;
}